上次在玩一手游看到里面有一个摇一摇抽奖，游戏是web做的所以在网上找了些代码实现了js摇一摇功能，
具体内容不详解，直接上码
html代码
<audio id="musicbox" src=""></audio>
js代码
init(); var shake_threshold = 3000; var last_update = 0; var x = y = z = last_x = last_y = last_z = 0; function init() { if (window.devicemotionevent) { window.addeventlistener('devicemotion', devicemotionhandler, false); } else { alert('not support mobile event'); } } function devicemotionhandler(eventdata) { var acceleration = eventdata.accelerationincludinggravity; var curtime = new date().gettime(); if ((curtime - last_update) > 100) { var difftime = curtime - last_update; last_update = curtime; x = acceleration.x; y = acceleration.y; z = acceleration.z; var speed = math.abs(x + y + z - last_x - last_y - last_z) / difftime * 10000; if (speed > shake_threshold) { alert("感觉到摇动，我要发射了"); var media = document.getelementbyid("musicbox"); //获取音频控件 media.setattribute("src", "imgy/shake_sound.mp3"); media.load(); //加载音频 media.play(); //播放音频 } last_x = x; last_y = y; last_z = z; } }